Question

Reason for Using Red Color in Danger Signals
Why is red color used in the danger signals?

Answer 1

The primary reason why the color red is used for danger signals is that red light is scattered the least by air molecules. The effect of scattering is inversely related to the fourth power of the wavelength of a color. ................

Answer 2

 red color used in the danger signals because
1)it has max wavelength
2)it can travel through long distances
3)it can also travel through smog